<div class="container">
    <div class="row justify-content-center d-flex align-items-center" style="height: 15rem">
        <div class="col-12 col-lg-10 text-center">
            <h1>{{ or .Params.header .Title }} </h1>
            {{ if isset .Params "subheader" }}
            <p class="lead mb-0">{{ .Params.subheader }}</p>
            {{ end }}
        </div>
    </div>
</div>